EP0197421B1 - Method and apparatus for forming a row of zigzag coupling elements for slide fasteners - Google Patents
Method and apparatus for forming a row of zigzag coupling elements for slide fasteners Download PDFInfo
- Publication number
- EP0197421B1 EP0197421B1 EP86104048A EP86104048A EP0197421B1 EP 0197421 B1 EP0197421 B1 EP 0197421B1 EP 86104048 A EP86104048 A EP 86104048A EP 86104048 A EP86104048 A EP 86104048A EP 0197421 B1 EP0197421 B1 EP 0197421B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die wheel
- monofilament
- unit
- coupling element
- peripheral surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/42—Making by processes not fully provided for in one other class, e.g. B21D53/50, B21F45/18, B22D17/16, B29D5/00
- A44B19/44—Securing metal interlocking members to ready-made stringer tapes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D5/00—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
- B29D5/04—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners the interlocking members being formed by continuous meander of filamentary material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/814—Zipper
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49782—Method of mechanical manufacture of a slide fastener
- Y10T29/49785—Method of mechanical manufacture of a slide fastener of interlocking element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5101—Slide fastener or slide fastener element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53291—Slide fastener
- Y10T29/53304—Means to assemble teeth onto stringer
Definitions
- the present invention relates to a method of and an apparatus for forming a row of continuous zigzag coupling elements for slide fasteners from a filament of thermoplastic synthetic resin according to the preambles of claims 1 and 4.
- Canadian Patent No. 669,722 and Japanese Patent Laid-Open Publication No. 59-125506 disclose a coupling-element forming apparatus which comprises a heated die wheel having an annular central groove in its peripheral surface and a pair of rows of circumferentially staggered pins disposed one row on each side of the groove.
- This prior apparatus also comprises a series of working units, i.e.
- a winding unit for winding a monofilament of thermoplastic synthetic resin around the pins in a zigzag form across the groove, a bending unit for forcing the zigzag monofilament into the groove to form a row of zigzag coupling element blanks having parallel legs interconnected at their lower ends by lower connecting portions, a punching unit for compressing the lower connecting portions against the bottom of the groove to form coupling heads each having a pair of lateral projections, a hammering unit (as occasion demands) for bending upper end portions of the parallel legs laterally outwardly away from each other to form raised connecting portions interconnecting adjacent coupling element blanks, and a discharging unit for removing the thus finalized coupling elements from the die wheel, these working units being arranged around the peripheral surface of the die wheel in this order.
- a heating means such as an electric heater or a low-frequency induced heater, is mounted in the die wheel for heating the whole thereof to a temperature suitable for heat-setting of the monofilament.
- the discharging unit includes a scraper having a distal end touching the bottom of the annular peripheral groove of the die wheel.
- the monofilament in the shape of coupling elements is instantaneously heat set by blowing outside air.
- coupling heads formed on the monofilament would be objectionably deformed due to the contact with the distal end of the scraper. This objectionably deformed coupling heads would result in staggered inter-element pitches as exposed to the wind of the outside air.
- the present invention seeks to provide a method of and an apparatus for forming a row of zigzag coupling elements, in which a monofilament of thermoplastic synthetic resin can be shaped into the final form of coupling elements easily and stably and in which the coupling elements of the final shape can be discharged from a heated die wheel without being objectionably deformed. Consequently the present invention enables an improved rate of production.
- a method of forming a row of continuous zigzag coupling elements for slide fasteners on a rotating die wheel having an annular groove in its peripheral surface, and a pair of rows of circumferentially staggered pins disposed one row on each side of said groove comprising the steps of: winding the monofilament alternately around the pins across the annular groove in a zigzag form; forcing the zigzag monofilament in the annular groove so as to shape the same into a row of folded U-shaped zigzag coupling element blanks having parallel legs interconnected at their lower ends by lower connecting portions; and compressing the lower portions of the U-shaped coupling element blanks into the shape of coupling heads to thereby put the coupling element blanks in a final form of the coupling elements; characterized in that said die wheel is heated from its inside such that, throughout the coupling element formation, the whole of said die wheel remains at a predetermined temperature slightly lower than the temperature at which a monofilament
- an apparatus for forming a row of continuous zigzag coupling elements 11 for slide fasteners includes a die wheel 1 mounted on a frame 2 for rotation by a suitable drive (not shown).
- the die wheel 1 has an annular central groove 5 in its peripheral surface 3, and a pair of rows of circumferentially staggered pins 4, 4 disposed one row on each side of the groove 5, as shown in Figures 2A, 2B, 3A, 3B, 4A, 4B, 5A and 5B, there being a pair of rows of circumferentially staggered projections 6, 6 on opposite side walls of the groove 5.
- the apparatus also includes a winding unit 12 for winding a monofilament 7 of thermoplastic synthetic resin, such as polyester and polyamide, alternately around the pins 4, 4 across the groove 5 in a zigzag form ( Figure 2A), a lifting unit 13 for lifting the zigzag monofilament 7 away from the pins 4 ( Figure 3B), and a bending unit 14 in the form of a rotary disk for forcing the lifted zigzag monofilament 7 into the groove 5 to form a row of zigzag coupling element blanks 8 having parallel legs 9, 9 interconnected at their lower ends by lower connecting portions (Figures 3A and 3B).
- a winding unit 12 for winding a monofilament 7 of thermoplastic synthetic resin, such as polyester and polyamide
- the apparatus still also includes a punching unit 16 for compressing or deforming each lower connecting portion to form a coupling head 10 having a pair of lateral projections ( Figures 4A and 4B), a hammering unit 17 for bending upper end portions of the parallel legs 9, 9 laterally outwardly away from each other to form raised connecting portions 9', 9' interconnecting adjacent coupling element blanks 8 ( Figures 5A and 5B), and a discharging unit 18 for removing the thus finalized coupling elements 11 from the die wheel 1.
- the discharging unit 18 is in the form of a scraper having a distal end touching the bottom of the groove 5.
- the peripheral surface 3 of the die wheel 1 is additionally (as described below) heated locally by an exterior heater 15 disposed on the upper side of the die wheel 1 for heat setting the monofilament 7 in the form of U-shaped coupling element blanks 8, and is cooled locally by a cooling unit 20 disposed on the lower side of the die wheel 1.
- the hammering unit 17 may be omitted, and according to the conditions for temperature, the cooling unit 20 also may be omitted.
- the die wheel 1 is fixedly mounted on a shaft 30 rotatably supported on the frame 2 and has a hollow 24 within which an interior heater 26 is disposed for heating the whole of the die wheel 1 so as to maintain its temperature slightly lower than the temperature at which the monofilament 7 is deformable.
- the interior heater 26 comprises a low-frequency electromagnetic induction coil fixedly mounted on the frame 2.
- the interior heater 26 may be an electric heater or a heat-medium circulating heater.
- the die wheel 1 has in its one side surface a number of openings 27 communicating with the hollow 24 for radiation purposes.
- heater 15 is disposed in confronting relation to the peripheral surface 3 of the die wheel 1 and includes a blast pipe 22 for heated air, and a cover 23 of generally C-shaped cross section connected to the blast pipe 22 and enclosing an upper portion of the peripheral surface 3.
- the cover 23 is closed at one end (left in Figure 1) adjacent to the punching unit 16 and is open at the other end (right in Figure 1) adjacent to the bending unit 14 so that the heated air introduced from the blast pipe 22 flows from the punching-unit end to the bending-unit end in the direction of an arrow a.
- a change-over valve 21 is mounted in the blast pipe 22 for discharging heated air upon termination of the apparatus operation.
- the cooling unit 20 is disposed in confronting relation to the peripheral surface 3 of the die wheel 1 and includes a blast pipe 29 for outside air, and a cover 28 of generally C-shaped cross section connected to the blast pipe 29 and enclosing a lower portion of the peripheral surface 3.
- the cover 28 is closed at one end (right in Figure 1) adjacent to the discharging unit 18 and is open at the other end (left in Figure 1) adjacent to the hammering unit 17 so that the outside air introduced from the blast pipe 29 flows from the discharging-unit end to the hammering-unit end in the direction of an arrow b opposite to the direction of rotation of the die wheel 1.
- the monofilament 7, in the form of the thus U-shaped coupling element blanks 8 retained in the groove 5, is additionally heated locally by the exterior heater 15 such that its temperature rises to a heat setting temperature, whereupon the lower connecting portions of the U-shaped coupling element blanks 8 are compressed or deformed, by a reciprocable punch head 16' of the punching unit 16, into the shape of coupling heads 10 each having a pair of lateral projections ( Figures 4A and 4B).
- this row of zigzag coupling elements 11 retained in the groove 5 is removed and discharged from the peripheral surface 3 of the die wheel 1 by the scraper of the discharging unit 18 after having been cooled by the cooling unit 20.
- the rotating die wheel 1 is heated by the interior heater 26 so as to remain at a constant temperature ranging from 60°C to 70°C which is slightly lower than the characteristic deforming temperature of polyethylene terephthalate.
- the monofilament 7 in the form of U-shaped coupling element blanks 8 is locally heated up to the characteristic heat setting temperature of polyethylene terephthalate by the exterior heater 15 through which heated air at a temperature ranging from about 120°C to about 130°C is blown.
- the present invention it is possible to shape a monofilament of thermoplastic synthetic resin into the predetermined final form of coupling elements easily and stably. Also the coupling elements in the predetermined shape can be discharged from the die wheel without being objectionably deformed. Consequently the present invention is particularly suitable for highspeed production of a continuous row of zigzag coupling elements.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Slide Fasteners (AREA)
- Treatment Of Fiber Materials (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP68430/85 | 1985-04-02 | ||
JP60068430A JPS61228805A (ja) | 1985-04-02 | 1985-04-02 | スライドフアスナ−用ジグザグ状フアスナ−エレメント列の連続成形方法とその装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0197421A2 EP0197421A2 (en) | 1986-10-15 |
EP0197421A3 EP0197421A3 (en) | 1988-08-03 |
EP0197421B1 true EP0197421B1 (en) | 1990-05-23 |
Family
ID=13373472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86104048A Expired - Lifetime EP0197421B1 (en) | 1985-04-02 | 1986-03-25 | Method and apparatus for forming a row of zigzag coupling elements for slide fasteners |
Country Status (15)
Country | Link |
---|---|
US (1) | US4665603A (ja) |
EP (1) | EP0197421B1 (ja) |
JP (1) | JPS61228805A (ja) |
KR (1) | KR870001643B1 (ja) |
AU (1) | AU562278B2 (ja) |
BR (1) | BR8601603A (ja) |
CA (1) | CA1260237A (ja) |
DE (1) | DE3671405D1 (ja) |
ES (1) | ES8701595A1 (ja) |
GB (1) | GB2173442B (ja) |
HK (1) | HK63990A (ja) |
MY (1) | MY101340A (ja) |
PH (1) | PH24063A (ja) |
SG (1) | SG56990G (ja) |
ZA (1) | ZA862381B (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0669405B2 (ja) * | 1988-12-20 | 1994-09-07 | 吉田工業株式会社 | ジグザグ型連続フアスナーエレメントの製造方法 |
US5688539A (en) * | 1996-05-03 | 1997-11-18 | Chung Shan Institute Of Science & Technology | Zipper teeth forming mechanism for zipper forming machines |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA669722A (en) * | 1963-09-03 | Streicher Kurt | Method and machine for the production of closure elements for slide fasteners | |
US3054149A (en) * | 1958-02-22 | 1962-09-18 | Talon Inc | Method for the production of closure elements for slide fasteners |
US3106749A (en) * | 1959-02-19 | 1963-10-15 | Talon Inc | Method and machine for the production of closure elements for slide fasteners |
US3594865A (en) * | 1969-07-10 | 1971-07-27 | American Velcro Inc | Apparatus for molding plastic shapes in molding recesses formed in moving endless wire dies |
US3672805A (en) * | 1969-12-08 | 1972-06-27 | Bernd Porepp | Apparatus for forming a plastic article |
US3688805A (en) * | 1970-02-12 | 1972-09-05 | Textron Inc | Machine for coiling filamentary material |
DE2007593B2 (de) * | 1970-02-19 | 1973-05-10 | Opti-Holding Ag, Glarus (Schweiz) | Vorrichtung zur thermofixierung von reissverschlussgliederreihen aus kunststoffmonofilament |
US4182600A (en) * | 1975-08-04 | 1980-01-08 | Textron, Inc. | Slide fastening element apparatus |
JPS54161439A (en) * | 1978-06-09 | 1979-12-21 | Yoshida Kogyo Kk | Method and device for making element train for slide fastener |
JPS59125506A (ja) * | 1982-12-28 | 1984-07-19 | ワイケイケイ株式会社 | スライドフアスナ−用ジグザグ状エレメント成形装置 |
-
1985
- 1985-04-02 JP JP60068430A patent/JPS61228805A/ja active Granted
-
1986
- 1986-03-24 CA CA000504926A patent/CA1260237A/en not_active Expired
- 1986-03-25 GB GB08607405A patent/GB2173442B/en not_active Expired
- 1986-03-25 EP EP86104048A patent/EP0197421B1/en not_active Expired - Lifetime
- 1986-03-25 DE DE8686104048T patent/DE3671405D1/de not_active Expired - Lifetime
- 1986-03-26 AU AU55380/86A patent/AU562278B2/en not_active Ceased
- 1986-03-28 US US06/845,518 patent/US4665603A/en not_active Expired - Fee Related
- 1986-03-29 KR KR1019860002392A patent/KR870001643B1/ko not_active IP Right Cessation
- 1986-03-31 BR BR8601603A patent/BR8601603A/pt not_active IP Right Cessation
- 1986-03-31 ES ES553538A patent/ES8701595A1/es not_active Expired
- 1986-04-01 ZA ZA862381A patent/ZA862381B/xx unknown
- 1986-04-02 PH PH33613A patent/PH24063A/en unknown
-
1987
- 1987-08-20 MY MYPI87001388A patent/MY101340A/en unknown
-
1990
- 1990-07-17 SG SG569/90A patent/SG56990G/en unknown
- 1990-08-16 HK HK639/90A patent/HK63990A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
US4665603A (en) | 1987-05-19 |
KR860007902A (ko) | 1986-11-10 |
KR870001643B1 (ko) | 1987-09-18 |
EP0197421A2 (en) | 1986-10-15 |
JPS61228805A (ja) | 1986-10-13 |
CA1260237A (en) | 1989-09-26 |
ES8701595A1 (es) | 1987-01-01 |
AU562278B2 (en) | 1987-06-04 |
EP0197421A3 (en) | 1988-08-03 |
AU5538086A (en) | 1986-10-09 |
SG56990G (en) | 1990-09-07 |
GB2173442B (en) | 1988-11-02 |
GB8607405D0 (en) | 1986-04-30 |
ES553538A0 (es) | 1987-01-01 |
DE3671405D1 (de) | 1990-06-28 |
BR8601603A (pt) | 1986-12-09 |
MY101340A (en) | 1991-09-05 |
HK63990A (en) | 1990-08-24 |
GB2173442A (en) | 1986-10-15 |
PH24063A (en) | 1990-03-05 |
JPH0125564B2 (ja) | 1989-05-18 |
ZA862381B (en) | 1986-11-26 |
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